20190177

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 35418240

約数和(自身を除く): 15228063

約数列:

[1, 3, 7, 9, 21, 29, 43, 63, 87, 129, 203, 257, 261, 301, 387, 609, 771, 903, 1247, 1799, 1827, 2313, 2709, 3741, 5397, 7453, 8729, 11051, 11223, 16191, 22359, 26187, 33153, 52171, 67077, 77357, 78561, 99459, 156513, 232071, 320479, 469539, 696213, 961437, 2243353, 2884311, 6730059, 20190177]

約数ペア:

[(1, 20190177), (3, 6730059), (7, 2884311), (9, 2243353), (21, 961437), (29, 696213), (43, 469539), (63, 320479), (87, 232071), (129, 156513), (203, 99459), (257, 78561), (261, 77357), (301, 67077), (387, 52171), (609, 33153), (771, 26187), (903, 22359), (1247, 16191), (1799, 11223), (1827, 11051), (2313, 8729), (2709, 7453), (3741, 5397)]